Question

I would like to write a context processor which will look the existing context, and if there is a form present, check that the user has permission to edit that object. If not, I will overwrite that context variable.

How do I read the existing context from inside a context processor?

Edit:
The reason for using this type of context processor is to avoid having the check permissions with if statements in each view. Some users will have read/write access, others will have read-only and others will have no access, at the object level. I would like to manipulate the form accordingly after the view has been processed.

Answer 1

Why not just wrap the view with a user_passes_test decorator? You can run any checks you like there — no hacks required.